Default Values in ns2

All the default values in ns2 are located in a file name
"ns-default.tcl"
You can fine this file in directory
"/home/uesrname/ns-allinone-2.xx/ns-2.xx/tcl/lib"

This file actually set up all the default paramters. Each default parameter is stored in the OTcl class template and copied from the class into the instance when the object is created.

How to set MTU value in NS2

Default value of MTU(MaximumTransmission Unit) in ns2 is generally 1500.Now to change this value according to your research, just go to file "mac-802.3.h" and change the value of "IEEE_8023_MAXFRAME" and compile it once again. You can find this file in

/home/username/ns-allinone-2.xx/ns-2.xx/mac

TO know more about MTU and to know what it actually is just visit the following link.

http://www.pointless.net/~jasper/consume/docs/my-docs/mtu.html

Find Whether Processor is 32 bit or 64 bit in LINUX

You can find the configuration of system in which you are working and can find whether the processor is 32 bit or 64 bit. Just open terminal and type

$ getconf LONG_BIT
or one can try
$ uname -a
or
$ grep flags /proc/cpuinfo

GATE admission, Books Problems For computer science

All those who want any help regarding the procedure of admission, books, or any other thing related to GATE can leave comment in this . I will try to help you.

Disable or Enable Firewall In UBUNTU 9.04

U can visit this site for any firewall problem in ubuntu.



https://wiki.ubuntu.com/UbuntuFirewall

https://help.ubuntu.com/9.04/serverguide/C/firewall.html